\begin{Exercise}[title={八皇后问题},difficulty=2]
\label{ex:queen8}
\Question\label{ex:queen8 q1}
%%http://en.wikipedia.org/wiki/Eight_queens_puzzle
\end{Exercise}

\begin{Answer}
\Question 
\lstinputlisting[caption=八皇后问题,linerange={3,14}]{ex-functions/src/queen8.go}
\showremarks
\end{Answer}
